Pump.



F. LAMPLOUGH.

v PUMP.

APPLICATION FILED MAE..28, 1910'.

Patented Nov, 21, 1911.

2 SHEETS-SHEET 1.

fsw.

F. LAMPLOUGH.

PUMP.

APPLICATION-FILED MAR. 28, 1910.

Patented N 0V. 21, 1911,.

2 SHEETS-SHEET 2.

`UNITED sTArI-:s PATENT OFFICE.

FREDERICK LAMPLOUGH, OF LONDON, ENGLANI.

PUMP.

To all whom 'it 'may cmcem: f` y Be itlmewn: that I, FREDERICK LAMP- Lo'UoH, a subject of the King of Great Britain,` residing at London, England, have invented Tva4 new yand useful Improvement in lunips, ofvk which the following is a'speeilication. H- f k f `The invention relates to that class of pump having ports in the walls of'thecylinder `and a piston having a portion of reduced diameter, i.nto which reduced portion the ports inthe cylinder open. The pist-on has ports formed inthat portion which is of reduced diameter and it .is provided with an internal' sleeve alsoprovided 'with ports. T he piston iseonneeted with a crank shaft andduring its stroke, the internal sleeve is moved with relation to the piston so that during part of the suction stroke, the ports in the piston and the ports in the internal sleeve coincide and during the compression stroke, the sleeve-having moved with relation to the piston, the ports in the piston are closed by theI sleeve. The pump is provided with a non-return valvein the head of the cylinder, which non-return valve is covered by a chamber having an out-let. In this pulnp the sleeve has at its inner end a valve which seats itself in a seating in the inner end of the piston, which latter is open at its outer end. The sleeve is moved in one direction to open the` valve vby means of a projection on the endeof the connecting rod coming into contact with a projection on the interior ot the sleeve, and it is moved in the other direction to close its valve by means of a spring.

The object of tlhev present invention is to improve this type of pump by positively conneet-ing thel inner sleeve with a projectionor projections on the small end of the connect- .ing rod, and by getting rid of the valve carried by the sleeve. According to the present invention, the piston is closed toward its outer end by means of a cross web carried h v the inner sleeve. By these means I am able to construct a pump capable of working at a high speed which is specially suitable for use as a charging device for internal combustion engines, but which may be used generally for eoinpressing or exhausting air or gas.

'lhe invention is .illustrated in the aecompanying drawings as applied to an internal combustion engine. y

Figure 1 is a longitudinal section ofthe lsleeve Vc and the cylinder a..

specification of Letters ratent.- Patented Nov. 21, 1911. Application fled March 28, 1910. Serial No. 552,051.

pump, and Fig. 2 is another longitudinal section of the pump taken at right anglesvto Fig. 1. In Fig. 2 a cylinder of an internal combustion engine is also shown. F igg is a, longitudinal section of a modiiiedforin of pump, and Figs. et, 5, G and 7 show various positions of the parts of the acomplete revolution of the driving shaft.

The pump cylinder c is closed by adiaphragm non-return valve a at one end,r and is open at the other end.' The closed end of the cylinder is provided with a cover b, forming a passage, and saideover has "an outlet b.A Inv the drawings at Fig. 2, this outletis shown communieatingwith a cylinder of an ,internal combustion engine.

Thepmnp cylinder a has an inlet port ce2l vwhich may communicate with a earbnreter. `The piston has an exteriorpart ein the form -of a sleeve fitting the pump cylinder o at each end, and it has a port-ion e of smaller external diameter between the two ends leaving an annular space c2 between the The portion e of the piston has ports c, 'The exterior part c of the piston vhas a connecting rod (l pivoted thereto, by means of which it is driven from the crank shaft e.

So far the construction shown in Figs. 1 and 2 and that shown in Fig. 3 are identical. In both constructions the exterior part c of the piston has an interior part f which slides within the exterior part e and is positively moved in both directions with relation to the exterior part c by a lever projecting laterally from the connecting rodd. [nthe construction shown in Figs. 1 and 2, .there is only one interior sliding whereas in t-he construction shown 1n Fig. 3, there are two interior sliding parts.

piston duringpart f, i

As shown in Figs. 1 and 2, the eonnect- I ing rod d is pivoted at one side to the exterior part 0 and itihas a lever d' connected by a link g to the interior part j. This method of moving the inner part f ssimilar to that shown and described in the )eei- Y tieation of my Patent No. 574915, fp'iffnioving the interior part of anotherpunip piston. This part f has a cross lweb f and above this a series yof ports ffg. which in one. position communicate with the ports ca 1nv the portion e of the exterior part c. vDur- `ing the 4outward strole" f thepiston c, air Vorgas is drawn inytothc pump cylinder y a through the portzziifter which the ports c3 are closed, due to` the relative 'movement of the parts'c and f, and the air or gas is partially compressed during the inward stroke. The air or gas havin@r passed the Adiaphragin non-return valve a passes into 5' the cover I), which is shown extending over the top of the pump and down one side and is preferably east in one piece with the pump cylinder a. The air or gas passes from this cover through the port b directly l0 into ythe eXpl ,sion Cylinder of an engine.

`In the Construction shown at Fig. 3, the Connecting rod (Z is pivoted centrally to the piston o and instead of employing one lever d', I employ tivo levers (Z2, d3; I also employ .two interior sliding parts f, F. The part f has port, f2 and the part F has a cross web F and pjorts F2. These sliding parts and F are'pitovided with teeth f3 and F3, with which e'gage the levers (Z2, cl3. which are be unde Stood that as the-connecting rod, by thtl 1 tation of the eranl, swings to one or the other side of the dead. center, the sliding parts f and F are moved, the one upprovidevl at their ends with teeth. It will Wardand the other downward with relath(` stroke, the ports` f2 and F2 move away from the ports c3, thereby closing these latter. i

The action of the parts is elearly shown in Figs. 4, 5, 6 and 7, whehlillustrate the combination of a cylinder open at both ends,

a hollow piston in said cylinder; a portion of the hollow piston of smaller diameter than the ends thereof, forming an annular Space between the piston and the cylinder, a port in the cylinder walls always open to the atmosphere, ports in the piston walls leading into the annular space, an internal moving sleeve fitting the interior of said piston, a second moving sleew having a cross vweb and fitting the interior of the first moving sleeve, ports in said sleeves which coincide with each other and with those in the piston, a connecting rod pivoted to said piston, a lever on said Connecting rod, means operated by the lever, for moving said sleeves with relation to the piston and to each other, a non-return valve closing one end of the cylinder, a. Icover inelosing the non-return valve, andl an outlet in said cover;I substantially as set forth.

In witness whereof I have hereunto set my hand in presence of two witnesses.

FREDERICK LAMPLOUGH.

Witnesses:

CLQUDE K. MILLS, WM. GIRmNG. 

